Researchers create technology to produce lighter, long-lasting batteries from silicon with 10x the energy

https://uwaterloo.ca/news/news/waterloo-researchers-create-technology-produce-lighter-long

"Current lithium-ion batteries normally use graphite anodes. The Waterloo engineers found that silicon anode materials have a much higher capacity for lithium and are capable of producing batteries with almost 10 times more energy."

Really???